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Algae spreads across Lake Erie

Algae bloom spreads in Lake Erie

Algae is seen near the City of Toledo water intake crib in Lake Erie, about 2.5 miles off the shore of Curtice, Ohio, Aug. 3, 2014. Toledo officials issued the warning early Saturday after tests at one treatment plant showed two sample readings for microcystin above the standard for consumption, possibly because of algae on Lake Erie.

Credit: Haraz N. Ghanbari/AP

Algae bloom spreads in Lake Erie

Horacio Romero of Toledo, Ohio looks at algae in Lake Erie at Maumee Bay State Parkin Oregon, Ohio, Aug. 4, 2014. On Monday Toledo, Ohio area residents were once again able to drink tap water after a two day ban due to algae related toxins.

Credit: Aaron P. Bernstein/Getty Images

Algae bloom spreads in Lake Erie

Carol Snyder of Northwood, Ohio collects water from Lake Erie at Maumee Bay State Park August 4, 2014 in Oregon, Ohio.

Credit: Aaron P. Bernstein/Getty Images

Algae bloom spreads in Lake Erie

A sign warns bathers about algae infestation at Maumee Bay State Park in Oregon, Ohio, August 4, 2014. Toledo, Ohio area residents were once again able to drink tap water after a two day ban due to algae related toxins.

Credit: Aaron P. Bernstein/Getty Images

Algae bloom spreads in Lake Erie

The City of Toledo water intake crib in Lake Erie is surrounded by algae about 2.5 miles off the shore of Curtice, Ohio, Aug. 3, 2014. More tests are needed to ensure that toxins are out of Toledo's water supply, the mayor said Sunday, instructing the 400,000 people in the region to avoid drinking tap water for a second day. Toledo officials issued the warning early Saturday after tests at one treatment plant showed two sample readings for microcystin above the standard for consumption, possibly because of algae on Lake Erie.

Credit: Haraz N. Ghanbari/AP

Algae bloom spreads in Lake Erie

This satellite image provided by NOAA shows the algae bloom on Lake Erie in 2011 which according to NOAA was the worst in decades. The algae growth is fed by phosphorus mainly from farm fertilizer runoff and sewage treatment plants, leaving behind toxins that have contributed to oxygen-deprived dead zones where fish can't survive. The toxins can kill animals and sicken humans. Ohio's fourth-largest city, Toledo, told residents late Saturday Aug. 2, 2014 not to drink from its water supply that was fouled by toxins possibly from algae on Lake Erie. The ban was lifted on Aug. 4.

Credit: NOAA

Algae bloom spreads in Lake Erie

A truck arrives with cases of water outside Waite High School in Toledo, Ohio, Aug. 3, 2014. Some 500,000 residents in and around Toledo, Ohio were without safe drinking water for a second day on Sunday while local water supplies were being tested following the discovery of high toxin levels from algae on Lake Erie.

Credit: Joshua Lott/Reuters

Algae bloom spreads in Lake Erie

Volunteers unload cases of bottled of water one day after Toledo officials declared the city's water unsafe to drink, Aug. 3, 2014.

Credit: Joshua Lott/Reuters

Algae bloom spreads in Lake Erie

Motorist receive bladders of drinking water from volunteers outside Waite High School in Toledo, Ohio, Aug. 3, 2014.